TW445480B - Color cathode ray tube - Google Patents

Abstract

Provided is a color cathode ray tube, which comprises a panel including a substantially rectangular effective portion, of which the outer surface is a flat surface or a slightly curved surface, and a shadow mask having an effective surface opposite to the inner surface of the effective portion of the panel. In this color cathode ray tube, the inner surface of the effective portion of the panel is a curved surface having a substantially infinite curvature radius RXp1 in the major-axis direction on the major axis thereof near the center, a predetermined curvature radius RXp2 in the major-axis direction near peripheral portions on the major axis, and another predetermined curvature radius in the minor-axis direction on the minor axis thereof. This color cathode ray tube, with its panel having the substantially flat outer surface, enjoys improved visibility and higher strength for the maintenance of the curved surface of the shadow mask.

Description

Printed by the Consumers 'Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs *' 1 ^ Α Λ5 厶 8 Ο Α7 ____ Β7 V. Description of the invention (1) The present invention relates to a color image tube with an almost flat surface on the outside of the panel, especially It relates to a color image tube which improves its visibility and enhances the yesterday's intensity of the curved surface used to maintain the shadow mask. In general, a color video tube includes a vacuum peripheral device composed of a glass panel and a funnel-shaped funnel. In the color image tube, the 3 electron beams emitted from the electron gun assembly arranged in the neck of the funnel part are deflected by a magnetic field generated by a deflection device installed outside the funnel part. Through the mask, the screen formed by the three-color phosphor layer is horizontally and vertically scanned on the inner surface of the effective portion of the panel to display a color image. -In general, the panel of the color image tube is provided with a side wall, that is, a skirt, at a peripheral portion of a flat plate having a substantially rectangular effective portion, so as to obtain a durable The strength of the atmospheric pressure load applied to the vacuum peripheral device is such that the inner surface and the outer surface have different curved surfaces such that the central portion of the effective portion is thin and the peripheral portion is thick. In addition, the outer shape of the effective portion forms a curved surface having a height from the seal surface of the panel and the funnel portion, which is the highest in the central portion and lower toward the peripheral portion. Specifically, a curved surface that is formed as a spherical surface, or a radius of curvature in the short axis direction is set to have a large duty, and a cylindrical surface that has curvature in the long axis direction, or a surface expressed by a high-order polynomial . The outer shape of the effective portion of the panel has been flattened in recent years to improve visibility. As an example, it is disclosed in JP-A 9-2 4 5 6 8 5 that the outside of the effective part is almost set (please read the precautions on the back before filling out this page) Loading *! Order ·! This paper size applies China National Standard (CNS) A4 specification (210 X 297 public love) -4-Β7 V. Description of the invention (2) is flat, and its inner surface almost sets the radius of curvature in the direction of the long axis to infinity, and in the short axis A cylindrical surface with a radius of curvature in the direction. (Please read the precautions on the back before filling this page.) However, the visibility of the image drawn on the curtain is not only affected by the shape of the outer surface of the effective part, but also May be affected by the shape of the inner surface of the effective portion where the screen is provided. However, even if the shape of the outer surface and the inner surface of the effective portion is different, when the difference in thickness between the central portion and the peripheral portion is small, it is affected by the difference in meat thickness. It is not obvious, but when the meat thickness difference between the central part and the peripheral part becomes larger due to the planarization of the outside, the effect of the meat thickness difference will become obvious. Make for In order to improve the above visibility, it is desirable that both the inside and the outside of the effective portion are flat, but like the panel disclosed in Japanese Patent Application Laid-Open No. Hei 9-245685, the outside of the effective portion is almost formed into a flat surface and an inner surface. The radius of curvature in the long axis direction is almost infinite, and for a panel formed by a curved surface close to a cylindrical surface with a radius of curvature in the short axis direction, even if the screen is rectangular when viewed from the front of the effective part, When viewed from the side of the short side, it can be seen that the inner side of the short side of the active part will be bent. In order to improve the visibility for the purpose of flattening the outer part of the active part originally, that is, from the plane From the viewpoint of video display, it is hoped that it can be further improved. In addition, the panel is connected to the glass panel forming stage, because the thickness difference between the central portion and the peripheral portion of the effective portion is large, so the cooling rate of the glass will be reduced. There is a concern that a correct curve cannot be obtained. _ On the other hand, the mask is formed by the screen facing the screen formed inside the effective portion of the panel. Most of the electron beams are formed on the surface. The thickness of the paper is based on the thickness of the paper and the applicable Chinese national standard (CNS)> A4 (210 X 297 mm) -5- A7 '' A A5 厶 8 〇 ___ B7 _ V. Invention Explanation (3) {Please read the precautions on the back first and fill in this page) 0. 1 ~ 0. 3 mm, a substantially rectangular cover body 'and it is installed on the peripheral part of the cover body, and it is essentially It is composed of a rectangular mask frame. Generally speaking, the effective surface of the cover body must have a certain relationship with the inner surface of the effective part of the panel, so it must be formed almost within the effective part of the panel. The surface has the same curved surface. For the conventional color video tube, when the panel is directed upward, the mask is formed into a curved surface that is highest at the center and lower at the periphery. This curved surface shape is specifically formed as a spherical curved surface like the panel, or the curvature radius in the short axis direction is set to be infinite, and the cylindrical curved surface having curvature in the long axis direction is high. Surfaces represented by degree polynomials, etc. When the outer surface of the effective part is almost flat, the curvature radius of the inner surface in the long axis direction is set to be almost infinite, and the panel having a radius of curvature in the short axis direction is close to a cylindrical curved surface. Corresponding to this mask, the effective surface of the cover body, like the inner surface of the effective portion of the panel, must be set to set the radius of curvature in the long axis direction to almost infinite and have a radius of curvature in the short axis direction. Cylindrical surface. The mask is disclosed in the specification No. 9-3 6 3 2. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Generally speaking, the strength of the curved surface used to maintain the mask is based on the curved shape of the effective surface of the mask body, and the thickness of the mask body ' Size, and alignment. Therefore, when the thickness of the cover body and the shape, size, and arrangement of the electron beam passage holes are set to be the same, the surface retention strength of the cover is determined based on the shape of the curved surface of the effective surface. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -6-. In Λ 5 厶 8 Ο Α7 _______ Β7 _ V. Description of the invention (4) The index of the surface retention strength of this mask is in Among the curvature radii in different directions at any point on the effective surface, when the maximum curvature radius is set to Rn) aK 'and the minimum curvature radius is set to R min, the minimum curvature 1 / Rmax and the maximum curvature 1 / of its reciprocal

The sum of Rmin has an average curvature defined by 1 / Rma3C +. In conventional masks, when the amount of sinking in the diagonal portion becomes the largest effective surface, when the amount of sinking in the diagonal portion (the difference in distance between the center of the mask and its diagonal portion along the pipe axis) is the same, As shown in the aforementioned Japanese Patent Application No. 9 to 3 6 3 2, by setting the effective surface as a cylindrical curved surface, a curved surface having the largest average curvature can be provided, and the strength of the curved surface can be improved. However, for a mask that is almost flat on the outside of the effective portion, the amount of sinking in the diagonal portion of the effective surface becomes relatively small, and as a result, the curved surface holding strength becomes small. The reduction in the retention strength of the curved surface of the mask mentioned above has various bad effects on the color image tube. That is, when external force or impact is applied to the color image tube, the curved surface of the effective surface of the mask is easily deformed, and the image quality is deteriorated due to the deformation. When vibration is applied to the color image tube, resonance easily occurs, which leads to deterioration of color purity [, howling phenomenon). When a high-luminance image is locally displayed by high-density electrons, if the mask is partially thermally expanded due to the impact of the high-density electron beam, it will be caused by the local doming. As a result, the color purity is deteriorated. The deterioration of color purity caused by this partial dome is 'as shown in Figure 1' Chinese paper standard (CNS) A4 (210x297mm S) applies to the paper size of the picture book (please read the precautions on the back first) Fill out this page again), install! -Order ------- Line V. Description of the invention (5) The area 2 in the long axis direction (X axis) of the surface 1 which is slightly close to the middle portion of the short side SO will become the worst. (Guess to read the precautions on the back before filling in this page)-In general, in order to suppress the above-mentioned partial circle], it is effective to provide residual stress to the effective surface of the cover body. The surface retention strength of the mask is equivalent to this, and has the effect of suppressing the thermal expansion of the mask. Therefore, the reduction in the holding strength of the mask, especially the curved surface on the major axis of the effective surface, has a bad influence on the deterioration of color purity caused by local dome. As mentioned above, in recent years, the color video tube has been flattened to improve visibility. For the panel, the effective part is almost flat on the outside and the radius of curvature in the long axis direction is set to be almost infinite. The axial direction has a curvature radius close to a cylindrical curved surface. However, since the difference in thickness between the central portion and the peripheral portion of the effective portion becomes larger in this panel, when viewing the screen from the side of the short side, if the curvature is seen on the inner side of the short side of the effective portion, a flat image is used. From the viewpoint shown, there is a problem that there is room for improvement, and the desired visibility cannot be obtained. For the masks corresponding to the panel, for the masks corresponding to the panel, we propose to set the effective surface of the mask body to a long axis with a radius of curvature that is almost infinite. It is large and has a curvature in the short axis direction and a half-diameter radius close to a cylindrical curved surface. However, with this mask, the amount of sinking in the diagonal portion of the effective surface becomes smaller, and the curved surface holding strength becomes smaller. Therefore, when external force or impact is applied to the color image tube, the curved surface of the effective surface of the mask is easily deformed, and the image quality is deteriorated due to the deformation. When vibration is applied to the color image tube, ^ 8- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ΛΛ5 ^ Β〇Α7 Β7 5. The invention description (6) is prone to resonance, As a result, the color purity deteriorates. When a high-density image is displayed locally by a high-density electron beam, the mask thermally expands due to the collision of the high-density electron beam, and the purity of the p-portion is deteriorated due to the dome formation of the mask. From the viewpoint of good shape of the cover body, there is a problem that edge sinking easily occurs and it is difficult to set a curved surface with a certain radius of curvature. Ψ I! 才 i Disclosure of the Invention The object of the present invention is to improve the visibility of a color image tube provided with a panel that is almost flat on the outside, and to improve the strength of masks and curved surfaces. (1) It is mainly directed to a panel having a substantially rectangular effective portion on the outside, or a panel having a number of curvatures, and an effective surface formed with a plurality of electron beam passing holes facing the inner surface of the effective portion of the panel. The color image tube formed by the mask forms the inner surface of the effective portion of the panel on a long axis near the center, has an almost infinite radius of curvature in the long axis direction, and near the periphery on the long axis, A curved surface having a constant radius of curvature in the axial direction and a constant radius of curvature in the minor axis direction on the minor axis. (2) In the color image tube of (1,) above, the inner surface of the effective portion of the panel is formed near the periphery on the long axis, has a radius of curvature that is almost constant in the long axis direction, and on the short axis, A curved surface having an almost constant curvature radius in the minor axis direction. (3) In the color image tube mentioned above, the paper size of the effective part of the panel applies the Chinese national standard (CNS > A4 specification (210 X 297 mm)) -9-(Please read the precautions on the back before filling this page ) Loaded

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I; • In A5 厶 8 〇A7 _ B7 V. Description of the invention (7) The inner surface is formed on the short axis near the center, with a radius of curvature almost constant in the direction of the short axis, and on the short axis The peripheral part has a curved surface whose curvature radius is smaller than that in the minor axis direction near the center. (4) It is mainly directed to a panel with a substantially rectangular effective portion on the outside, or a panel having a number of curvatures, and an effective surface formed with a plurality of electron beam passage holes facing the inner surface of the effective portion of the panel. The color image tube formed by the mask, when the tube axis is set to the positive direction on the outer surface of the panel, and the center, long axis end, and short axis end of the effective portion of the panel are set to Cp respectively When Hp, Vp, these Cp, Hp, Vp satisfy the relationship of Cp > Hp > Vp. (5) Mainly for a substantially rectangular active part whose outer surface is flat, or a panel with a number of curvatures, and an effective surface formed with a plurality of electron passage holes is a mask facing the inner surface of the effective part of the panel When the color image tube is formed, the tube axis is set to the positive direction on the outer surface of the panel, and the coordinates of the center, long axis end, short axis end, and diagonal axis end of the inner surface of the effective portion of the panel are respectively on the tube axis. When set to Cp, Hp, Vp, Dp, then these Cp, Hp, Vp, Dp satisfy Cp >

Hp > V p2Dp relationship. (6) It is mainly directed to a substantially rectangular effective part whose outer surface is flat, or a panel having several curvatures, and an effective surface formed with a plurality of electron beam passing holes is facing the inner surface of the effective part of the panel. The color image tube formed by the mask has the effective part of the mask formed on a long axis near the center, and has an almost infinite radius of curvature in the long axis direction, and near the periphery on the long axis, on the long axis. The direction has a certain radius of curvature. ≪ Please read the precautions on the back before filling in this page.) Install! —Order. 1 !!! Line i This paper size is applicable to China National Standard (CNS) A4 specification < 210 X 297 mm) -10-r, A A5 厶 8 〇A7 B7 5. Description of the invention (8) and A curved surface with a certain radius of curvature in the minor axis direction on the minor axis. (7) In the color image tube of the above (6), the effective portion of the mask is formed near the periphery on the long axis and has a radius of curvature that is almost constant in the long direction, and on the short axis, in the short axis A curved surface having an almost constant radius of curvature in the axial direction. (8) In the color image tube of the above (6), the effective portion of the mask is formed on a short axis near the center, has a radius of curvature that is almost constant in the short axis direction, and a periphery on the short axis In some cases, there is a curved surface having a smaller curvature radius than the curvature radius in the minor axis direction near the center. (9) Mainly for a substantially rectangular active part whose outer surface is flat, or a panel having a number of curvatures, and an effective surface formed with a plurality of electron beam passing holes is a cover facing the inner surface of the effective part of the panel. When the color image tube formed by the cover has the tube axis set to the positive direction on the outer surface of the panel, and the coordinates of the center, long axis end, and short axis end of the effective portion of the mask on the tube axis are set to Cm, When Hm, Vm, then these Cm, Hm, Vm satisfy the relationship of Cm > Hm > Vm "(1 0) is mainly for a substantially rectangular active part with a flat outer surface or a panel with some curvature And a color image tube formed by a mask having an effective surface system with a plurality of electron beam passing holes facing the inner surface of the effective portion of the panel, when the tube axis is set to the positive direction on the outer surface of the panel, the mask is set When the coordinates of the center, long axis end, short axis end, and diagonal axis end of the effective part on the pipe axis are respectively set to Cm, Hm > Vm, Dm, then these Cm, Hm, Vm, Dm satisfy Cm > Hm > This paper size applies Chinese National Standard (CNS) A4 Specifications (210 * 297 male fireflies) < Please read the precautions on the back before filling out this page "Order --------- Line 1 Α7 _____ Β7__ 5. Description of the invention (9)

Vm2Dm's relationship. Hereinafter, a color video tube according to an embodiment of the present invention will be described with reference to the drawings. Fig. 2 shows a color video tube according to an embodiment of the present invention. The color image tube has a flat plate having a rectangular effective portion 10 having a horizontal axis (X axis) substantially orthogonal to the tube axis (Z axis) as a long axis and a vertical axis (Y axis) as a short axis. (Face plate) The peripheral part is provided with a side wall (skirt). 1 1 is a substantially rectangular panel 12 and one end side is formed in a funnel shape constituted by a cylindrical neck 13. A vacuum peripheral device constituted by a funnel portion 14 joined to an end portion of the side wall 11 of the panel 12 described above. On the inner surface of the effective portion 10 of the panel 12, a screen 1 5 formed of a three-color phosphor layer that emits light of blue, green, and red is provided. A cover main body 17 having a large number of electron beam passing holes formed by an effective surface 16 facing a predetermined interval away from the screen 15 in accordance with a certain arrangement, and a cover frame 1 8 mounted on a peripheral portion of the cover main body 17 are arranged. The formed mask (shodow mask) 1 9. On the other hand, an electron gun capable of emitting 3 electron beams 21B, 21G, and 21R (only Z (G) is shown in the neck portion 1 3 of the funnel portion 14. In addition, the 3 emitted from the electron gun 2 2 The electron beams 2 1 B, 2 1 G, and 2 1 R are deflected by the magnetic field generated by the deflection device 2 3 installed outside the funnel portion 1 4. The screen 15 scans horizontally and vertically to display color portraits. In particular, the color image tube, in which the effective size of the panel 12 of the paper 10, is in accordance with the Chinese national standard (CNS > A4 specification (210 X 297 male) * > -12- nil ----! V pack-! 1 order ------ i, line: (Please read the unintentional matter on the back before filling this page) B Ο A7 _______B7 _ V. Description of the invention (10) (Please read the precautions on the back before filling this page) The outside is almost flat or has a slight curvature. In addition, the inner surface of the effective part 10 is formed as shown in FIG. 3 In the long axis near the center, in the direction of the long axis, that is, in the plane determined by the long axis and the pipe axis, and in a plane parallel to this, Infinitely large curvature radius RXp 2, but in the short axis, in the direction of the short axis, that is, in the plane determined by the short axis and the tube axis and in a plane parallel to this, the The curved surface (not shown) is formed on the short axis near the center, and has a radius of curvature RYp 1 of almost constant in the short axis direction, and the peripheral direction on the short axis has a short axis direction near the center. The radius of curvature RYpl is a curved surface with a small radius of curvature RYp2 (RYp2 < RYpl). Thus, when the outer direction of the tube axis panel is positive, the center of the inner surface of the effective part, the long axis end, the short axis end, and the When the coordinates of the angular axis end on the pipe axis are respectively set to Cp, Hp, Vp, and Dp, then these Cp, Hp, Vp 'Dp satisfy the relationship of Cp > Hp > Vp or Cp > Hp > VpgDp. When the Ministry of Economic Affairs is wise Printed by the production consumer cooperative. In addition, the so-called outside of the effective portion 10 of the panel 12 is almost flat, or has a slight curvature means that the outside is completely flat, or from the center of the effective portion 10 to the opposite side. The average radius of curvature at the corner ends is 1 0 0 0 〇 m Cases above m "On the other hand, regarding the mask 19, the effective portion 16 of the mask body 17 is formed on the long axis near the center as shown in Fig. 4, and in the long axis direction, That is, it has an almost infinite radius of curvature in the plane determined by the long axis and the tube axis and in a plane parallel to this. RX m 1 'This paper size applies the Chinese national standard (CNS > A4 specification (210 X 297 cm) %> A7 _B7______ 5. Description of the invention (11) (Please read the precautions on the back before filling this page} Near the periphery on the long axis, there is almost a certain radius of curvature R Xm 2, and on the short axis, In the direction of the minor axis, that is, in a plane determined by the minor axis and the pipe axis and a plane parallel thereto, a curved surface (not shown) having a certain radius of curvature P is formed, or is formed in the center The nearby minor axis has an almost constant radius of curvature RYml in the minor axis direction, while the peripheral direction in the minor axis has a radius of curvature RYml that is smaller than the minor axis direction near its center. The radius of curvature RYm2 is smaller (RYm2 < RYml) Surface. Therefore, when the outer direction of the panel of the pipe axis is positive, the coordinates of the center, long axis end, short axis end, and diagonal axis end of the inner surface of the effective part are set to Cm, Hm, Vm, and Dm, respectively. Then, the Cm, Hm, Vm, and Dm satisfy the relationship of Cm> Hm> Vm or Cm> Hm> Vm2Dm. As described above, when the panel 12 and the mask 19 are formed, the outer surface of the effective portion 10 of the panel 12 is almost flat or has a slight curvature. This can improve the visibility of the color image tube and improve the shielding. The curved surface of the hood 1 9 maintains strength. Hereinafter, the panel i 2 and the mask 19 of the color video tube will be described according to an embodiment. Embodiment 1 A panel of a color image tube with an aspect ratio of 16: 9 and a diagonal size of 76 cm is the most recent mainstream. The panel of the color image tube is shown in FIG. The paper size on the inside is applicable to the national standard (CNS) A4 specification (21 × 297 public love) -14-Α7 Β7 Jade, description of the invention (12), on the long axis near the center, the radius of curvature in the long axis direction RXp 1 is almost infinite, and has a radius of curvature RX P 2 that is almost constant in the long axis direction near the periphery on the long axis. Also on the short axis near the center, the radius of curvature RYp 1 in the short axis direction is almost constant, and near the periphery on the short axis, it has a smaller curvature than the radius of curvature RTp 1 in the short axis direction near the center. radius. The specific radii of the radii of curvature RXpi ′ RXp2, RYpl, and RYp2 in the long axis direction and the short axis direction are shown in Table 1. RXpl RXp2 RYpl RYp2 Curvature radius (mm) 〇〇500 1160 600 As shown in the table, the color image tube RX ρ 1 = 〇〇RXpl pregnant RXp2 RYpl > RYp2 When the outer direction of the panel of the tube axis is set to positive Direction 'When the tube axis coordinate Cp at the center of the inner surface of the effective part is set to the origin (cp = 0)' The coordinates of the long axis end, short axis end, and diagonal axis end of the inner surface of the effective part on the tube axis Hp, Vp , Dp becomes 値 shown in Table 2, and the relationship between CP, -HP, Vp, and Dp becomes Cp > Hp > Vp2Dp. Please read the item on the back first and then fill in the 'Page ί w IIIIII Order I l' Economy Printed by the Intellectual Property Bureau of the Ministry of Consumers ’Cooperatives. Paper size is applicable to China National Standard (CNS) A4 (210 x 297 mm) 8 4 5 4 4 R7 V. Description of the invention (13) Table 2 Center short axis end of the active part Long axis end Diagonal axis end Tube axis coordinates 0 -15.6 -3.8 -15.6 In addition, for the vicinity of the short side of the inner surface of the effective part of the panel, the radius of curvature from the direction of the long axis passing through the long axis changed from RXp 1 to RXP 2 The minor axis of the point is a parallel straight line (indicated by a dashed line in Figure 2) as an edge , While the border between the short side is provided so that the surface almost parallel to the major axis radius of curvature in minor axis direction of the curve smoothly connected. The curved surface near the short side of the inner surface of the effective portion may be a curved surface in which a curve with a constant radius of curvature almost parallel to the short axis is smoothly connected in the long axis direction between the boundary and the long side. When the panel is structured as described above, when viewed from the side *, the short side is close to a straight line, and the visibility of the image on the screen formed on the inner surface of the effective portion can be improved. That is, for a panel composed of a cylindrical curved surface in which the outer surface of the effective portion is almost flat, the radius of curvature in the long axis direction of the inner surface is set to be almost infinite, and the radius of curvature in the short axis direction is set to be constant, As shown in Figure 5A, when the panel .25 is viewed from the front, even if the effective part can be seen as a rectangle, when viewed from the short side, the curvature in the short axis direction will become the screen. The bending in the short axis direction can be regarded as an arc shape by the height difference between the long axis end 26 and the diagonal axis end 2 7-. As a result, the portrait drawn on the screen will feel out of place. This paper size applies to China National Standard (CNS) A4 specification mo X 297 public love) -16- (Please read the precautions on the back before filling in this page)-Install 丨 Order III, 111 丨 II--. D45AB 〇 5. Description of the invention (14) (Please read the notes on the back before filling in this page) However, when the panel is constructed as in this embodiment, if the 5B diagram is shown, the long axis end 26 and the diagonal The height difference between the shaft ends 27 is that even when the panel 12 is viewed from the side, the short length of the inner part of the effective part is close to a straight line, which can reduce the sense of incongruity of the image drawn on the screen. In addition, in the above-mentioned embodiment, although the curvature radius of the inner surface of the effective portion of the panel in the short-axis direction is divided into two parts near the center and the peripheral portion, the inner surface of the effective portion of the panel is not necessarily near the center and The peripheral part must have an almost constant radius of curvature. When the radius of curvature can be gradually changed from the central part to the peripheral part, the visibility of the image can be improved in the same way. Also, the curvature radius in the long axis direction does not necessarily have to be almost infinite near the center, and it has a constant curvature radius in the peripheral portion. However, in this case, it is important that the positional relationship between the long axis end, the short axis end, and the diagonal axis end with respect to the pipe axis is C p > H p > V p > Dp. Embodiment 2 The following describes the mask of a color image tube which has become the most popular mainstream with an aspect ratio of 16: 9 'and a diagonal size of 76 cm. The face and plate of the color image tube are as shown in FIG. The effective surface of the cover body is on the long axis near the center, and the radius of curvature RXm 1 in the long axis direction is almost infinite. Near the periphery on the long axis, the radius of curvature R Xm 2 is almost constant in the long axis direction. . Also on the short axis near the center, the radius of curvature RYm 1 in the short axis direction is almost constant, and the paper size on the short axis applies the Chinese National Standard (CNS) A4 (210 X 297 mm) A7

8 〇 5. Description of the invention (15) Near the periphery, the radius of curvature RYml is smaller than the radius of curvature RYml in the short axis direction near the center. The specific M of the curvatures in the major axis direction and the minor axis direction of PRXml, R Xm2, RYml, and RYm2 are shown in Table 3. Table 3 RXml RXm2 RYml Rym2 curvature radius (mm) 〇〇470 1160 600 As shown in Table 3, the color image tube RX m 1 = ° RXml ^ RXm2 RYml > RYm2 When the outer direction of the panel of the tube axis is When the positive direction is set and the pipe axis coordinate Cm at the center of the inner surface of the effective portion is set as the origin (Cm = 0), the coordinates of the long axis end, the short axis end, and the diagonal axis end of the inner surface of the effective portion on the pipe axis Hm 'Vm, Dm becomes 値 shown in Table 4, and these Cm, + Hm, Vm, Dm become the relationship Table 4 The center of the effective part of the center short axis end long axis end diagonal axis end tube axis coordinates 0 -15.6 -4.0 -16.0 This paper size applies to Chinese national standards (CNS > A4 size (210 χ 297 mm) 1 A 45 4 8 A7 ______B7____ V. Description of invention (彳 6) (Please read the notes on the back before filling this page ) Also, for the vicinity of the short side of the effective surface, a straight line parallel to the short axis passing through the point where the radius of curvature in the direction of the long axis on the long axis changes from RX m 1 to RX m2 (indicated by a dotted line in FIG. 4) ) As a boundary, and set the boundary and the short side so that a certain curvature half parallel to the long axis The curved surface smoothly connected in the direction of the short axis. For curved surfaces near the short side of the effective surface, the boundary between the above-mentioned boundary and the long side can be set such that a curve with a certain radius of curvature almost parallel to the short axis is in the long axis direction. Smoothly connected curved surfaces. When the mask is formed as described above, the surface retention strength can be improved. That is, as shown in FIG. 6A, the radius of curvature of the effective surface in the long axis direction is set to be almost infinite. As shown in FIG. 6B, when the mask 29 formed by a cylindrical curved surface with a curvature radius in the short axis direction being a constant curvature radius is set on a long axis near the center, as shown in FIG. The radius of curvature in the axial direction is almost infinite, and when there is a curved surface with a radius of curvature that is almost constant in the long axis direction near the periphery on the long axis, the substantial surface can be obtained by the long axis end sinking into the center of the effective surface. It has the same effect as the case of increasing the curvature in the long axis direction. It can increase the strength of the curved surface to maintain the mask. By setting the radius of curvature near the periphery on the short axis to the curvature in the short axis direction near the center With a small radius of curvature, the same + effect as when the curvature in the minor axis direction is increased can be obtained, and from this point of view, the surface retention strength can be improved. Result * Even when an external force or impact is applied to the color image tube, It can suppress the deformation of the effective surface, and can prevent the image quality from being deteriorated due to the deformation of the effective surface. Even when vibration is applied to the color image tube, the Chinese National Standard (CNS) A4 specification (210 X 297 mm) is applied by this paper size. ) A7 B7_ V. Description of the invention (17) (Please read the precautions on the back before filling this page) Improve the strength of the curved surface of the peripheral part in the long axis direction that is particularly prone to resonance, which can prevent the color purity caused by resonance. deterioration. In addition, by increasing the strength of the curved surface, it is possible to prevent the color purity from being deteriorated due to the partial dome caused by the impact of high-density electronic sound. It can effectively suppress the local dome formation which is particularly weak, and is located near the middle of the short side in the long axis direction, and can prevent the deterioration of color purity caused by local dome formation. Moreover, in the above-mentioned embodiment, although the case where the curvature radius of the short-axis direction of the effective surface of the cover body was divided into two parts near the center and the peripheral part was described, the short axis of the effective surface of the cover body The curvature radius in the direction does not necessarily have to be divided into two divisions near the center and the periphery. As long as the periphery is smaller than the vicinity of the center. That is, even if the curvature radius in the short-axis direction is not constant but changes continuously, the same effect as that of the above embodiment can be obtained. For the radius of curvature in the long axis direction, the peripheral part is smaller than the vicinity of the center, and it is important that the positional relationship of the long axis end, the short axis end, and the diagonal axis end to the pipe axis becomes Cm > Hrn > VmgDm. The consumer cooperation of the Intellectual Property Bureau of the Ministry of Economic Affairs printed the above-mentioned "Let the panel be formed as an effective part with a flat outer surface or a slight curvature, while the inner surface has a long axis near the center and almost Infinite curvature radius, near the periphery on the long axis, has a certain radius of curvature in the long axis direction, and on the short axis, the surface of the short axis cube has a certain radius of curvature, especially one on the long axis Near the periphery, it has a radius of curvature that is almost constant in the long axis direction, and on the short axis, it has a curved surface with a certain radius of curvature in the short axis direction, or the paper size applies the Chinese National Standard (CNS) A4 specifications (210 η 297 mm) '.4 Λ 5 ^ S 〇a? B7 V. Description of the invention (18) < Please read the precautions on the back before filling in this W) into a short axis near the center, The curvature radius in the minor axis direction is almost constant, and the curvature radius near the periphery on the minor axis is smaller than the curvature radius in the minor axis direction near the center, or when the major axis end of the inner surface of the effective part is Minor axis end of the diagonal axis end at coordinates Η p along the tube axis, Vp, Dp satisfy Cp > Hp > Vp, or Cp > Hp > when V p g relationship D p, it is possible to improve visibility. The mask is also formed on a long axis near the center of the effective surface of the cover body, and has a nearly infinite radius of curvature in the long axis direction, and a certain radius of curvature in the long axis direction near the periphery on the long axis. On the short axis, a curved surface with a certain radius of curvature in the short axis direction, or particularly near the periphery on the long axis, has a nearly constant radius of curvature in the long axis direction, and on the short axis, in the short axis The direction has a curved surface with a certain radius of curvature, or forms a short axis near the center, which has a nearly constant radius of curvature in the direction of the short axis, and near the periphery on the short axis. The radius of curvature is greater than its center. The radius of curvature in the nearby minor axis direction is a small curved surface | or when the outer direction of the panel of the pipe axis is set to a positive direction, and the center long axis end, short axis end, and diagonal axis end of the effective surface are on the pipe axis When the coordinates Cm, Hm, Vm * Dm satisfy the relationship of Cm > Hm > Vm, or Cm >, the surface retention strength can be improved, thereby preventing deformation due to the effective surface when external force or oxygen strike is applied The deterioration of the image quality caused by the deterioration of the color purity due to resonance or local dome, and it is easy to form a certain shape of the cover body. . Brief description of the drawing: This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm). Produced by Guicun Wisdom Co., Ltd. and consumer cooperation: id printed fv 4d5 4 8 〇 A7 ______B7 V. Invention Explanation (19) FIG. 1 is an explanatory diagram showing a portion that is prone to local doming in a mask of a conventional color image tube. Fig. 2 is an explanatory diagram showing the structure of a color lance according to an embodiment of the present invention. Fig. 3 is an explanatory diagram showing the inner shape of the effective portion of the panel of the color image tube shown in Fig. 2 "Fig. 4 is a diagram of the cover body of the mask of the color image tube shown in Fig. 2 An illustration of the shape of the effective surface. Figure 5A is a cylinder viewed from the side. The outside of the effective part is almost flat, and the inside is a cylinder with the radius of curvature in the long axis direction set to almost infinite and the radius of curvature in the short axis direction. An oblique perspective view of a panel formed by a curved surface. Figure 5B is a plan view from the side. The outside of the effective part is almost flat, while the inner surface has a nearly infinite radius of curvature in the long axis direction on the long axis near the center and near the periphery on the long axis. In the major axis direction, there is approximately a certain radius of curvature, and in the minor axis near the center, there is almost a certain radius of curvature in the minor axis. Near the periphery on the minor axis, there is a curvature in the minor axis direction near the center. A schematic perspective view of a panel of Embodiment 1 of the present invention formed by a curved surface with a small radius of curvature. Figure 6A is a view from the side. The effective surface of the cover body sets the radius of curvature in the long axis direction to be almost infinite, and the radius of curvature in the short axis direction is set to a constant cylindrical surface. Stereoscopic view of the hood of the chanting. Figure 6B is a table viewed from the side of the long axis near the center, with an almost infinite radius of curvature in the long axis direction. The peripheral paper on the long axis is sized according to the Chinese National Standard (CNS) A4. (210 X 297 mm) ----------- install --------- order ------ line- (Please read the precautions on the back before filling this page > .Λ45480 A7, ___ B7____ 5. Description of the invention (20) Near * has a certain radius of curvature in the long axis direction, and a short axis near the center, has a nearly constant radius of curvature in the short axis, and in the short axis A close-up perspective view of a mask formed by a curved surface having a smaller radius of curvature than the center of the short axis near the center of the upper edge. The symbol of the drawing illustrates: I 0 effective part II side wall (skirt ) 12 panel 1 3 neck 14 funnel 15 screen 16 effective surface (cover body) 17 cover body 18 cover frame 19 cover 21B, G, R 3 electron beam • 2 2 electron gun 23 deflection device 2 5 panel 2 6 Long shaft end (panel) 2 7 Diagonal shaft end (panel) 2 9 Mask C p The paper size of the coordinates on the axis of the tube is in accordance with the Chinese National Standard (CNS) A4 (210 X 297 public love) < Please read the precautions on the back before filling this page) 'V equipment ------- -Order inn 1 t ί nt line / AB 〇a? B7 V. Description of the invention (21) Η ρ Coordinate on the pipe axis of the long axis end of the inner surface of the effective part of the panel • V ρ Short axis end of the inner surface of the effective part of the panel Coordinates on the tube axis

Coordinates of the diagonal axis end of the inner surface of the effective part of the Dp panel on the real axis

Cm Coordinate of the center of the inner surface of the effective portion of the panel on the pipe axis H m Coordinate of the long axis end of the inner surface of the effective portion of the panel on the pipe axis V m Coordinate of the short axis end of the inner surface of the effective portion of the panel on the pipe axis

Coordinates of the diagonal axis end on the inner side of the effective part of the Dm panel on the pipe axis (please read the precautions on the back before filling this page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs for consumer cooperation ^ 24- This paper size applies to China Standard (CNS) A4 size (210x 297 male cage)

Claims (1)

Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs V A8 g _ D8 VI. Patent application scope 1 · A color image tube, which is mainly aimed at the outside of a substantially rectangular active part with a mechanism for generating an electron beam It is a flat image or a panel with a slight curvature, and the effective surface formed with a hole through which the electron beam can pass through is a color image tube formed by a mask facing the inner surface of the effective part of the panel, which is characterized by: | The inner surface of the effective portion of the panel is formed on the long axis near the center, and has an almost infinite radius of curvature in the long axis direction, and near the periphery on the long axis, has a certain radius of curvature in the long axis direction. , And on the minor axis, a surface with a certain radius of curvature in the minor axis direction. 2. For the color image tube of the first patent application scope, the inner surface of the effective part of the panel is formed near the periphery on the long axis and has a nearly constant radius of curvature in the long axis direction. A curved surface having an almost constant curvature radius in the minor axis direction. 3. For the color image tube of the first patent application scope, the inner surface of the effective part of the panel is formed on the short axis near the center, has a nearly constant radius of curvature in the short axis direction, and the periphery on the short axis In some cases, there is a curved surface having a curvature radius smaller than that in the minor axis direction near the center. 4. A color image tube, which is mainly a needle with a mechanism for generating an electron beam, the outside of a substantially rectangular active part is a flat surface, or a panel with a number of curvatures, and is formed for the above The effective surface of the hole through which the electron beam passes is a color image tube formed by a mask facing the inner surface of the effective portion of the panel, and is characterized in that: when the tube axis is set to the positive direction outside the panel, the panel {PLEASE Please read the notes on the back before filling in this page >: 衣 • 1 I ί Ⅱ Order ---------! The size of the paper is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) -25- A8B8C8D8 AA5A80 VI. The coordinates of the center, long axis end, and short axis end of the effective part of the patent application scope on the pipe axis When Cp, Hp, and Vp are set, respectively, these Cp, Hp, and Vp satisfy the relationship of Cp > Hp > V p. 5. A color image tube, which is mainly aimed at a mechanism having an electron beam, The outer surface of the substantially rectangular effective portion is a flat surface, or a panel having a number of curvatures, and an effective surface formed with a hole through which the electron beam can pass is a mask facing the effective inner surface of the panel. The color image tube is characterized in that when the tube axis is set to the positive direction on the outer surface of the panel, the center, long axis end, short axis end, and diagonal axis end of the inner surface of the effective portion of the panel are on the tube axis. When the coordinates are set to Cp, Hp, Vp, and Dp, respectively, the Cp'Hp, Vp, and Dp satisfy the relationship of Cp > Hp > Vp2Dp. 6. A kind of color image tube, which is mainly used to generate electricity. The electron beam mechanism is essentially moment The outer surface of the active part of the panel is a flat surface, or a panel with a number of curvatures, and the active surface formed with a hole through which the electron beam can pass is a color image tube formed by a mask facing the inner surface of the active part of the panel. It is characterized in that the effective part of the mask is formed on the long axis near the center, has an almost infinite radius of curvature in the long axis direction, and has a constant near the periphery on the long axis in the long axis direction. Curvature radius, and curved surface with a certain radius of curvature in the minor axis direction on the minor axis * 7. If the color image tube of the patent application No. 6 and the effective part of the mask are formed on the major axis Near the perimeter, there is the paper size between the long axis and the applicable Chinese National Standard (CNS) A4 specification (210 * 297 mm) -26- (Please read the precautions on the back before filling this page). Clothing ---- --- t Order i — !!! Line 'Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. The scope of patent application is almost a certain radius of curvature, and on the short axis, there is almost a half of curvature in the direction of the short axis. 8. As for the color shadow / picture tube in the scope of patent application No. 6, the effective portion of the mask is formed on the short axis near the center, and has a certain radius of curvature in the direction of the short axis. The peripheral part on the short axis has a curved surface with a curvature radius smaller than that in the short axis direction near the center. 9-A color image tube mainly aimed at having a mechanism for generating an electron beam, in essence The outer surface of the active portion having a rectangular shape is a flat surface, or a panel having a number of curvatures, and the effective surface formed with a hole through which the electron beam can pass is a color image formed by a mask facing the inner surface of the effective portion of the panel. The tube is characterized in that when the direction of the tube axis outside the panel is set to a positive direction, and the coordinates of the center, the long axis end, and the short axis end of the effective portion of the mask on the tube axis are set to Cm, Hm, When Vm, these Cm, Hm, and Vm satisfy the relationship of Cm > Hm > Vm. 1 0. A color image tube mainly for a mechanism having a mechanism for generating an electron beam, the outside of a substantially rectangular effective part is a flat surface, or a panel having a number of curvatures, and a panel for the above is formed. The effective surface of the hole through which the electron beam passes is a color image tube τ formed by a mask facing the inner surface of the effective portion of the panel, which is characterized in that when the tube axis is set to the positive direction on the outer surface of the panel, the above mask is effective When the coordinates of the center of the part on the pipe axis of the long axis end, the short axis end, and the diagonal axis end are respectively set to Cm 'Hm, Vm, and Dm, these Cm, Hm, Vm, and Dm satisfy Cm > Hm > VmgDm Relationship. This paper size applies to China National Standard (CNS) A4 specifications (210 * 297 mm) -27-(Guess to read the notes on the back of the page before filling in the page) 'yi.I] 11111 «— — — — — — I Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs